/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */

package org.apache.jmeter.gui.action;

import java.awt.event.ActionEvent;
import java.util.HashSet;
import java.util.Set;

import javax.swing.JOptionPane;

import org.apache.jmeter.gui.GuiPackage;
import org.apache.jmeter.util.JMeterUtils;

/**
 * This command clears the existing test plan, allowing the creation of a New
 * test plan.
 * 
 */
public class Close implements Command {

	private static final Set commands = new HashSet();

	static {
		commands.add(ActionNames.CLOSE);
	}

	/**
	 * Constructor for the Close object.
	 */
	public Close() {
	}

	/**
	 * Gets the ActionNames attribute of the Close object.
	 * 
	 * @return the ActionNames value
	 */
	public Set getActionNames() {
		return commands;
	}

	/**
	 * This method performs the actual command processing.
	 * 
	 * @param e
	 *            the generic UI action event
	 */
	public void doAction(ActionEvent e) {
		performAction(e);
	}
	
	/**
	 * Helper routine to allow action to be shared by LOAD.
	 * 
	 * @param e event
	 * @return true if Close was not cancelled
	 */
	static boolean performAction(ActionEvent e){
		ActionRouter.getInstance().doActionNow(new ActionEvent(e.getSource(), e.getID(), ActionNames.CHECK_DIRTY));
		GuiPackage guiPackage = GuiPackage.getInstance();
		if (guiPackage.isDirty()) {
			int response;
			if ((response=JOptionPane.showConfirmDialog(GuiPackage.getInstance().getMainFrame(), 
					JMeterUtils.getResString("cancel_new_to_save"), // $NON-NLS-1$
					JMeterUtils.getResString("save?"),  // $NON-NLS-1$
					JOptionPane.YES_NO_CANCEL_OPTION,
					JOptionPane.QUESTION_MESSAGE)) == JOptionPane.YES_OPTION) {
				ActionRouter.getInstance().doActionNow(new ActionEvent(e.getSource(), e.getID(), ActionNames.SAVE));
			}
			if (response == JOptionPane.CLOSED_OPTION || response == JOptionPane.CANCEL_OPTION) {
				return false; // Don't clear the plan
			}
		}
		
		closeProject(e);
		return true;
	}
	
	static void closeProject(ActionEvent e) {
		GuiPackage guiPackage = GuiPackage.getInstance();

		guiPackage.clearTestPlan();
		guiPackage.getTreeListener().getJTree().setSelectionRow(1);

		ActionRouter.getInstance().actionPerformed(new ActionEvent(e.getSource(), e.getID(), ActionNames.ADD_ALL));
	}
}
